Composite electronic component and resistor device

Abstract

A composite electronic component includes a capacitor device and a resistor device disposed on one another in a heightwise direction. The capacitor device includes a capacitor body, a first external electrode, and a second external electrode. The resistor device includes a base portion, a resistor body, a first upper surface conductor, a second upper surface conductor, a first lower surface conductor, a second lower surface conductor, a first end surface connection conductor, and a second end surface connection conductor. An upper surface of the base portion of the resistor device faces a lower surface of the capacitor body of the capacitor device, the first upper surface conductor and the first external electrode are electrically connected, and the second upper surface conductor and the second external electrode are electrically connected.

What is claimed is: 
     
       1. A composite electronic component comprising:
 a resistor device; and 
 a capacitor device mounted on the resistor device in a heightwise direction; wherein 
 the resistor device includes:
 an insulating base including an upper surface and a lower surface that are opposite to each other in the heightwise direction, and a pair of end surfaces that are opposite to each other in a lengthwise direction orthogonal or substantially orthogonal to the heightwise direction; 
 a resistor body provided on the insulating base; 
 a first upper surface conductor and a second upper surface conductor provided on the upper surface of the insulating base and separated from each other in the lengthwise direction; 
 a first lower surface conductor and a second lower surface conductor provided on the lower surface of the insulating base and separated from each other in the lengthwise direction; 
 a first end surface connection conductor provided on one of the pair of end surfaces of the insulating base and connecting the first upper surface conductor and the first lower surface conductor; 
 a second end surface connection conductor provided on the other of the pair of end surfaces of the insulating base and connecting the second upper surface conductor and the second lower surface conductor; and 
 a third lower surface conductor and a fourth lower surface conductor provided on the lower surface of the insulating base, located between the first lower surface conductor and the second lower surface conductor in the lengthwise direction, and separated from each other; 
 
 the capacitor device includes:
 a capacitor body including a lower surface orthogonal or substantially orthogonal to the heightwise direction; and 
 a first external electrode and a second external electrode provided on an external surface of the capacitor body and separated from each other in the lengthwise direction; 
 
 the upper surface of the insulating base and the lower surface of the capacitor body face each other in the heightwise direction; 
 the first upper surface conductor and the first external electrode are electrically connected to each other; 
 the second upper surface conductor and the second external electrode are electrically connected to each other; 
 the resistor body is provided on the lower surface of the insulating base and located between the first lower surface conductor and the second lower surface conductor in the lengthwise direction; and 
 the third lower surface conductor and the fourth lower surface conductor are connected to the resistor body. 
 
     
     
       2. The composite electronic component according to  claim 1 , wherein the third lower surface conductor and the fourth lower surface conductor are separated from each other in a widthwise direction orthogonal or substantially orthogonal to the heightwise direction and the lengthwise direction. 
     
     
       3. The composite electronic component according to  claim 1 , further comprising a protective film covering the resistor device. 
     
     
       4. The composite electronic component according to  claim 3 , wherein the protective film completely covers the resistor device. 
     
     
       5. The composite electronic component according to  claim 1 , wherein at least one of the first end surface connection conductor and the second end surface connection conductor entirely covers or substantially entirely covers a corresponding one of the pair of end surfaces of the insulating base portion. 
     
     
       6. The composite electronic component according to  claim 1 , wherein the resistor body has a thickness of about 1 nm or more and about 10 nm or less. 
     
     
       7. The composite electronic component according to  claim 1 , wherein at least one of the first end surface connection conductor and the second end surface connection conductor includes a surface that is at least partially covered with a protective film. 
     
     
       8. The composite electronic component according to  claim 1 , wherein the insulating base portion includes alumina. 
     
     
       9. The composite electronic component according to  claim 1 , wherein at least one of the first external electrode and the second external electrode includes a conductive film. 
     
     
       10. The composite electronic component according to  claim 1 , wherein at least one of the first external electrode and the second external electrode includes a multilayer film of a sintered metal layer and a plating layer. 
     
     
       11. The composite electronic component according to  claim 1 , wherein the capacitor body includes a plurality of dielectric layers alternately stacked with a plurality of internal electrode layers. 
     
     
       12. The composite electronic component according to  claim 1 , wherein the resistor body includes a metal coating, a metal oxide coating, or a metal glaze coating that is a mixture of the metal oxide coating and glass. 
     
     
       13. The composite electronic component according to  claim 1 , wherein at least a portion of at least one of the first lower surface conductor, the second lower surface conductor, the third lower surface conductor, the fourth lower surface conductor, the first upper surface conductor, and the second upper surface conductor is buried in base portion. 
     
     
       14. A resistor device comprising:
 an insulating base portion including an upper surface and a lower surface that are opposite to each other in a heightwise direction, and a pair of end surfaces that are opposite to each other in a lengthwise direction orthogonal or substantially orthogonal to the heightwise direction; 
 a resistor body provided on the insulating base; 
 a first upper surface conductor and a second upper surface conductor provided on the upper surface of the insulating base and separated from each other in the lengthwise direction; 
 a first lower surface conductor and a second lower surface conductor provided on the lower surface of the insulating base and separated from each other in the lengthwise direction; 
 a first end surface connection conductor provided on one of the pair of end surfaces of the insulating base and connecting the first upper surface conductor and the first lower surface conductor; 
 a second end surface connection conductor provided on the other of the pair of end surfaces of the insulating base and connecting the second upper surface conductor and the second lower surface conductor; and 
 a third lower surface conductor and a fourth lower surface conductor provided on the lower surface of the insulating base, located between the first lower surface conductor and the second lower surface conductor in the lengthwise direction, and separated from each other; wherein 
 the resistor body is provided on the lower surface of the insulating base and located between the first lower surface conductor and the second lower surface conductor in the lengthwise direction; 
 the third lower surface conductor and the fourth lower surface conductor are connected to the resistor body; and 
 the first upper surface conductor and the second upper surface conductor are not connected to any resistor body. 
 
     
     
       15. The resistor device according to  claim 14 , wherein the third lower surface conductor and the fourth lower surface conductor are separated from each other in a widthwise direction orthogonal or substantially orthogonal to the heightwise direction and the lengthwise direction. 
     
     
       16. The resistor device according to  claim 14 , further comprising a protective film covering the resistor body. 
     
     
       17. The resistor device according to  claim 14 , wherein at least one of the first end surface connection conductor and the second end surface connection conductor entirely covers or substantially entirely covers a corresponding one of the pair of end surfaces of the insulating base portion. 
     
     
       18. The resistor device according to  claim 14 , wherein the resistor body has a thickness of about 1 nm or more and about 10 nm or less. 
     
     
       19. The resistor device according to  claim 14 , wherein at least one of the first end surface connection conductor and the second end surface connection conductor includes a surface that is at least partially covered with a protective film. 
     
     
       20. The resistor device according to  claim 14 , wherein the insulating base portion includes alumina.